#include <stdio.h>
int main(int argc, char const *argv[])
{
    char level;
    printf("请输入成绩的级别>:");
    scanf("%c", &level);
    printf("level=%c\n", level);
    switch (level)
    {
    case 'A':
        printf("90<=成绩<=100\n");
        break;
    case 'B':
        printf("80<=成绩<90\n");
        break;
    case 'C':
        printf("70<=成绩<80\n");
        break;
    case 'D':
        printf("60<=成绩<70\n");
        break;
    case 'E':
        printf("0<=成绩<60\n");
        break;

    default:
    printf("输入级别错误，请重新输入\n");
        break;
    }
    return 0;
}
